Search found 22 matches

by 304751905
Thu Mar 16, 2017 9:26 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Room temperature
Replies: 1
Views: 538

Re: Room temperature

If the Gibb's free energy is negative, then the reaction will be spontaneous, and it will likely occur at room temperature.
You can also assess the deltaS and deltaH values to see if the reaction will take place at low, high, or all temperatures (see page 37 in the course reader).
by 304751905
Mon Mar 06, 2017 11:49 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15894

Re: Quiz 3 Winter 2017

for #1, why do we need "iso" in front of propyl? wouldn't the 4- signify the branching?
by 304751905
Sat Mar 04, 2017 4:46 pm
Forum: *Alkanes
Topic: General list of special case common names
Replies: 1
Views: 272

Re: General list of special case common names

I'm pretty sure the only ones we are going to see are "iso" and "neo." That should all be on page 94 in the course reader.
by 304751905
Wed Feb 22, 2017 6:31 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate Law
Replies: 2
Views: 354

Re: Rate Law

I'm wondering this too. When do we have to use the pre-equilibrium approach and when can we just calculate the rate of the slowest step?
by 304751905
Wed Feb 22, 2017 6:20 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Order
Replies: 1
Views: 241

Re: Order

It can be fractional but I doubt we'll see that very often.
by 304751905
Thu Feb 09, 2017 8:23 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Change in entropy= q/T [ENDORSED]
Replies: 3
Views: 386

Re: Change in entropy= q/T [ENDORSED]

I have another question that has to do with the same equation. If T=0K like in the quiz, wouldn't that make entropy 0 or not exist? How can something have entropy when it is at absolute zero? It can't move and it's in crystalline structure.
by 304751905
Thu Feb 02, 2017 9:59 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019419

Re: Post All Chemistry Jokes Here

[
by 304751905
Thu Feb 02, 2017 9:53 am
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Rechargeable Batteries
Replies: 2
Views: 468

Re: Rechargeable Batteries

This article seems pretty cool: "this new battery could allow for wireless devices to transmit their signals 30 times farther — or, perhaps more usefully, be equipped with a battery that’s 30 times smaller. If that wasn’t enough, this new battery is rechargeable — and can be charged 1,000 times...
by 304751905
Tue Jan 17, 2017 3:44 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: units for enthalpy problems
Replies: 4
Views: 484

units for enthalpy problems

Hi,
In homework question 8.59 it asks to calculate the standard rxn enthalpy for a given reaction and the answer is in KJ/mol, and 8.63 asks for the standard rxn of enthalpy for another equation but the answer is just given in KJ. What units should we use?
Thanks.
by 304751905
Fri Jan 13, 2017 4:06 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question 8.9
Replies: 3
Views: 251

Re: Question 8.9

What does the variable w stand for?
by 304751905
Thu Dec 01, 2016 12:44 pm
Forum: Bronsted Acids & Bases
Topic: Acid/Base List from Course Reader
Replies: 1
Views: 313

Re: Acid/Base List from Course Reader

This is the list given to us.
by 304751905
Wed Nov 23, 2016 12:06 am
Forum: Administrative Questions and Class Announcements
Topic: Chemistry 14B Enrollment
Replies: 3
Views: 1017

Re: Chemistry 14B Enrollment

I heard that the waitlist was opening back up tonight, but when I try to enroll it asks for a PTE number...
by 304751905
Tue Nov 22, 2016 5:11 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Using ICE Table
Replies: 1
Views: 402

Using ICE Table

Hi, can someone help me understand which situations we use an ICE table in? Thanks.
by 304751905
Wed Nov 16, 2016 7:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Sulfato
Replies: 2
Views: 516

Re: Sulfato

Sulfato is one of those ligands that is monodentate but can be bidentate (hence the asterix).
by 304751905
Wed Nov 16, 2016 7:18 pm
Forum: Naming
Topic: Naming Coordinate Compounds
Replies: 1
Views: 275

Re: Naming Coordinate Compounds

Hi! The oxidation state is calculated by looking at the charges of all the ligands inside of the brackets. For example, if the coordination complex is neutral (no charge written outside of the brackets) you can calculate what positive charge the transition metal has by determining the collective neg...
by 304751905
Fri Nov 04, 2016 3:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1019419

Re: Post All Chemistry Jokes Here

Sixteen sodiums walk into a room. Who's next?
NA-NA-NA-NA
NA-NA-NA-NA
NA-NA-NA-NA
NA-NA-NA-NA
BATMAAAN!
by 304751905
Thu Oct 27, 2016 9:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Bruincast
Replies: 26
Views: 8112

Re: Bruincast

Thanks! I got it now. Just using it to review :)
by 304751905
Thu Oct 20, 2016 10:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Bruincast
Replies: 26
Views: 8112

Bruincast

Hi! Is bruin cast only audio? When I click on the Lavelle's link for bruincasts on his website it takes me to a page where all the lectures are but only the audio is there.
Thanks,
Audrey
by 304751905
Wed Oct 12, 2016 3:31 pm
Forum: Trends in The Periodic Table
Topic: elements with low ionization energy
Replies: 1
Views: 709

elements with low ionization energy

I am confused as to why elements with low ionization energy conduct electricity in their solid state?
by 304751905
Wed Oct 12, 2016 3:28 pm
Forum: Student Social/Study Group
Topic: Delta Terrace Study Group
Replies: 3
Views: 662

Re: Delta Terrace Study Group

Yes I would love to join! When/where? I think I saw another post on here about a delta terrace study group so maybe we can join up...
by 304751905
Wed Oct 12, 2016 3:25 pm
Forum: Quantum Numbers and The H-Atom
Topic: Atomic Spectra & Energy levels confusion
Replies: 4
Views: 363

Re: Atomic Spectra & Energy levels confusion

Yes that is what I meant! Ok thank you!
by 304751905
Fri Sep 30, 2016 4:59 pm
Forum: Quantum Numbers and The H-Atom
Topic: Atomic Spectra & Energy levels confusion
Replies: 4
Views: 363

Atomic Spectra & Energy levels confusion

Hi! Today in class we learned about the equation E2= -hR/n2. I'm confused as to why the E2 is lower as the energy level n (1,2,...) gets bigger. I get that it makes the denominator get larger and larger which makes the result smaller, but conceptually I thought it would be the opposite...

Go to advanced search